Sound-reproducing machine.



H. T. ISCHIFF.

' souwo REPRODUCING MACHINE.

APPLICATION FILED JAN-18.1%].

,msmsa.

Patented June 26, 1917.

M one.

' HENRY T. SGI-lIFF, OF GHICAGO,.ILLINOIS.

Specification of Letters Patent.

' SQUND-REPRODUCIN G MACHINE.

Patented June 26, 1917.-

Application filed January 18, 1917. Serial No. 142,986.

To all whom it may concern:

Be it known that I, HENRY T. Sonrrr, a

citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Sound- Reproducing Machines, of which the following is a specifimay be readily adjusted to'properlyrpostj tion the needle or stylus for use according to the character of the sound vibrations in the grooves of the particular record to be used, that is, whether the vibrations in the groove are of the vertical or lateral type.

A further object is to provide improved means whereby the length of the tone arm may be varied and so maintained, when the sound box is positioned for use with the di-fierent types of records, to compensate for the. change in the distance of the end of the needle or stylus from the pivotal axis of the tone arm, as the sound box by such adjustment'turns about an axis inclined to the of the tone arm. To the attainment of these ends and the accomplishment of'other new and useful obas will appear,-the invention consists in the" features of novelty in substantially the construction, combination and arrangement of the several parts hereinafter more fully described and claimed and shown in the accompanying drawing illustrating the invention and in which;

Figure 1 is a side view partly 1n elevatlon and partly in section of a tone arm constructed in accordance with the principles oi this invention and having the sound box and st lus or needle arranged in one posidotted lines in position to permit the needle or stylus. to be removed. I

Flg. 4 is a detail sectional view. on line 4-4, Fig. 1.

Fig. 5 is a detail side elevation of the sound box showing its connection with the tone arm and as taken opposite to the side shown in Fig. 1.

Referring more particularly to the drawmg, the numeral 10 desi nates a portion of the main section of a hollow tone arm and telescoping with the end of the main section is a hollow supplemental section 11 which is adapted to slidelongitudinally in the section 10 and also to be rotated within the section. The main section 10 is 'provided with a groove designated generally by the reference numeral '12. This groove extends in a gen- .eral direction lengthwise of the tone arm and is slightly inclined with respect to the axis of'the arm. Connected with the supplemental section 11 is a pin or projection 13 having a portion 14 in the form of a cap which is yieldably connected by means of a spring 16 with the pin 13. This pin projects through the slot 12 and is adapted to move therein, while the yielding cap or portion 14 is located on the outside of the arm. The portion 14 is provided with a tapered extremity 16 adapted to be seated in a seat 17 at the end of the slot 12.

The slot 12 is provided with a laterally projecting portionv 18 which has communication with the slot 12 and is adapted to receive the pin 13 when the supplemental section-11 is properly positioned with respect to'the main section 10 and when the supplemental section is rotated for a purpose hereinafter set forth.

The slot 12 being inclined to the longitudinal axis of the main section 10, will cause a slight rotary movement to be imparted to the supplemental section during its longitudinal adjustment and when the supplemental. section is moved in a direction to extend the tone arm, the pin 13 will engage a shoulder 19 which is formed to project into the path of movement of the pin in the slot 12. This shoulder 19 is located-in a position that when the pin 13 contacts therewith, the pin will be properly positioned in alinement with the laterally projecting portion 18 of the slot to direct the pin into the slot when the supplemental section is rotated. The partial rotation of the supplemental section during the extending of the tone arm, will also assist in directing the pin into the portion 18 of the slot.

Obviously seats similar to the seats 17 may be arranged at desired points in the slot" so that the yielding portion 14 of the pin will be seated therein and serve as a means for yieldingly locking the parts in adjusted positions.

The sound box 20 is provided with the usual stylus lever 21 having a portion 22 adapted to receive the stylus 23; This sound box is provided with a tubular portion 24 which telescopes with the free end ofthe supplemental section 11 of the tone arm so that the sound box may be rotated with respect to the tone arm and moved from the position shown in Fig. 1 to the position shown in. Fig. 3"and vice versa, to position the stylus according to the. type of record to be used.

The sound box may be connected with the supplemental section of the tone arm in any suitalj le manner but preferably by means of a pint 25, which is fastened to the tubular portion Qel and passes through a slot 26 in the supplemental section. This pin 24 is preferably provided with a yielding portion 27 having a bevel face 28 adapted to enter seats 29 at the ends of the slot 26 for yieldingly locking the sound box in its ad' justed position.

It will therefore be manifest that when the sound box 20 is adjusted from the position shown in Fig. 1 to the position shown in Fig. 3 with respect to the tone arm, the distance of the end of the needle or stylus from the pivotal axis of the tone arm will be varied, as the sound box by such adjustment will turn on an axis inclined to the axis of the tone arm. In order to compensate for this change in the distance, it is necessary to adjust the length of the tone arm and this is accomplished by means of the-pin and slot connection 12, 13. r

When the sound boxis in the position shown in Fig. 1, the tone arm must be ex tended, that is so that the pin 13 will be in the forward end of the slot 12 but when the sound box is in the position shown in Fig." 3 in 'full lines, the pin 13 must be located at v the inner end of the slot 12.

The laterally projecting portion 18 of the slot is provided as a means whereby the sound box may be moved into the dotted line position shown in Fig. 3 so as to permit the withdrawal and the insertionof the stylus 23 in the stylus holder 22.

The yielding portion of the pin 13 tom-' porarily locks the parts in their adjusted position and the shoulder 19 of the slot 12 will direct the pin 13 into the-portion 18 of the slot, while the inclined portion of the slot itself will impart-a slight rotary movement to the supplemental section during the longitudinal adjustment of the parts soas to move the pin 13 into a position that it will engage or abut theshoulder 19.

IV hat is claimed as new is 1. In a sound reproducing machine, a tone ment, to direct the pin into. the said lateral- SlOt- I, I i H 2. In a sound reproducing machine, a tone arm embodying telescoping sections, and a fin and slot connection between the sectionsto permit longitudinal adjustment thereof,-

there being a lateral branch communicating with the slot, intermediate the ends of the slot, the wall of one of the slots being shaped to position and direct the pin into the lateral branch of the slot when the sections are loiigitudinally adjusted.

3. In a sound reproducing machine, a tone arm embodying a main section, a supplemental section telescoping therewith and rotatable with respect thereto, a pin on one of the parts, the other part having a slot to receive the pin, said slot having a portion to permit longitudinal adjustment of the parts anda laterally extending portion commimicating therewith to receive the pin to permit rotary adjustment of the parts, one of said parts having means intermediate the ends of the slotforarresting the longifidinal adjustment of the parts and operating to position the pin to enter the laterally extending portion of the slot, and a 4. In a sound reproducing machinefaf;

tone arm embodying a main section, a

plemental section telescoping therewith and *rotatable with respect thereto, a pin on oneof the parts, the other part having a slot;

to receive the pin, said slot'having a por; tion to permit longitudinal adjustment of the parts and a laterally extending portien communicating therewith to receive the pin to permit rotary adjustment of the parts, there being means intermediate theends of the longitudinal portion of the slot for arresting thelongitudinal adjustment of the parts and operating to position the pin to enter the laterally extending portion of the slot, a sound box rotatably connected with the said supplementalsection, and

means for holding thesound box in its adjusted position with respect to the said supplemental section. I

5. In a sound reproducing machine, atone arm embodying a main section, a supplemental section telescoping therewith and rotatable with respect thereto, a pin. on one of the parts, the other part having aaslot to receive the pin, said slot having a portion to permit longitudinal adjustment of the parts and a laterally extending portion communicating therewith to receive the pin to permit rotary adjustment of the parts, means intermediate the ends of the longitudinal portion of the slot for arresting the longitudinal adjustment of the parts and operating to position the pin to enter the laterally extending portion of the slot, a sound box rotatably connected with the said supplemental section, and a pin on one of the parts, the other part having a slot to receive the pin to limit the rotary move ment of the. sound box with respect to said supplemental section, said pin having a yielding portion, and said slot having seats to temporarily receive said yielding portion.

'mental section for adjustment into two operative positions with respect to the said supplemental section, said sections being provided one with a projection and the other with a slot to receive the projection for limiting the longitudinal adjustment of the sections, said slot having a laterally extending portion communicating therewith to receive the projection to permit the supplemental sections to be rotated with respect to the main section, and a shoulder interme-' diate the ends of the first said portion of the slot and extending into the path of movement 'of the projection in said slot to position the projection to enter the laterally projecting portion of the slot.

, 7. In a sound reproducing machine, a tone arm embodying a main section, a supplemental section telescoping .therewith and rotatable with respect thereto, 'a -sound box pivotally connected with the said supplemental section for adjustment into two operative positions with respect to the said supplemental section, said sections being provided one with a projection and the other with a slot to receive the projection for limiting the longitudinal adjustment of the sections, said slot having a laterally ex tending portion communicating therewith to receive the projection to permit the supplemental sections to be rotated with respect to the main section, and a shoulder disposed intermediate the ends of the longitudinal portion of the slot and extending into the path of movement of the projection in said slot to position the projection to enter the laterally projecting portion of the slot, the said slot being shaped to impart a slight rotary movement to the said supplemental section during the longitudinal adjustment thereof. l v

' 8. A tone arm for sound reproducingmachines, embodying a main section, a supple mental section telescoping therewith and rotatable with respect thereto, a pin on one of the parts, the other part having a slot to receive the pin to permit longitudinal adjustment of the parts, said slot having a lateral branch, and a shoulder arranged in the path of movement of the pin to position the latter to enter the lateral branch, said shoulder being disposed intermediate of and spaced from the ends of the slot.

chines, embodying a main section, a supplemental section telescoping. therewith and rotatable with respect thereto, a pin on one of the parts, the other part having a slot to receive the pin to permit longitudinal adjustment of the parts, said slot having a lateral branch, and a shoulder arranged in the path of movement of. the pin to position v the latter to enter the 'lateral branch, said shoulder being disposed intermediate of and spaced from the ends of the slot, said slot being shaped to impart a slight rotary movement to the supplemental section when the parts are longitudinally adjusted.

10. A tone arm for sound reproducing machines, embodying a main section, a supplemental section telescoping therewith and rotatable with respect thereto, a pin on one of the parts, the other part having a slot to receive the pinto permit longitudinal adjustment of the parts, said slot having a lateral branch, and a shoulder, arranged in the path of movement of the pin to position the latter to enter the lateral branch, said shoulder being disposed intermediate of and spaced from the ends of the slot, said projection embodying a yieldingportion, and said slot havingian open seat to receive the said yielding portion.

11. A tone arm for sound reproducing machines, embodying a main section, a supplemental section telescoping therewith and rotatable with respect thereto, a projection on one of the parts, the other part having a slot to receive the pin to permit longitudinal adjustment of the parts, said slot extending in a general direction lengthwise of the longitudinal axis of the arm and inclined with respect thereto, said slot having a lateral ofiset portion to receive the said projection when the said supplemental section is rotated, and a shoulder arranged intermediate the ends of the longitudinal portion of the slot to extend into the path of movement of the projection in the main portion of the slot to arrest the longitudinal adjustment of the parts and position the projection to enter the laterally off set portion of the slot.

12. Ina sound reproducing machine, a tone arm embodying telescopingQsections,

and a pin and slot connection between the sections to permit longitudinal adjustment thereof, there being a lateral communicating branch to the slot intermediate the ends of the slot, there being means cooperating with the said pin to arrest the longitudinal adjustment of thesections and to position lateral slot to permit, a relative rotary adjustment of the sections.

13. In a sound reproducing machine, a": tone arm embodying telescoping sections,

the pin to enter the and a pin and slot connection between the sections to permit longitudinal adjustment thereof, there being a lateral communicating branch to theslotintermediate the ends of the the pinto enter relative rotary said pin having slot, there being meansjcooperating With the said pin to arrest the longitudinal adjustment of thesections and to position 5 a yielding portion adapted yi'eldingly entera seat in the other seclle'In a sound reproducing machine, a tone arm embodying telescoping sections, and a pin and slot connection between the sections to permit longitudinal adjustment "thereof, there being a lateral communicating branch to the slot intermediate the ends "of the slot, there being means cooperating with the said pin to arrest the longitudinal adjustinent of the sectionsandtto position, the pin to enter vthe lateral slot to permit a relative rotary adjustment of the sections, said pin embodying abody, a portion slidable upon the body, and an elastic element disposed between the said portion and the body of thepin, there being an open seat '=on the other section of the armadapted to yieldi-ngly receive the said slidabl'e portion of the pin. Y

In testimony whereof I have signed my name to this specification, in the presence of 50 two subscribing Witnesses, on this 16th day 'ofJamiarygA. 1917.

' HENRY T. SQHIFF.

Witnesses IRMA M. BAKING, J. H. J ooHUM, Jr. 

